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(No Model.) 2 Sheets-Sheet 1.

H. HARTIG.

GAS ENGINE. No. 391,528. Patented Oct. 23, 1888.

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(No Model.) 2 Sheets-Sheet 2.

H. HARTIG.

GAS ENGINE.

N0. 391,528. Patent-ed 001;. 28, 18881.

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HENRY HARTIG, OF BROOKLYN, N EWV YORK.

SPECIFICATION forming part of Letters Patent No. 391,528, dated October23, 1888.

Application filed November 22, 1887. Serial No. 255,864. (No model.)

To all whom it may concern:

Be it known that I, HENRY HARTIG, of the city of Brooklyn, county ofKings, and State of New York, have invented certain new and usefulImprovements in Gas-Engines, of which the following is a specification.

The object of my invention is to provide a new and improved gas-enginewhich is simple in construction and effective in use; and the furtherobject of my invention is to provide a new and improved ignitingapparatus for the explosive mixture.

The invention consists in a gasengine having the explosion and pumpcylinders in a line, a piston passing through both cylinders and thesolid portion between the cylinders, a piston in each cylinder securedto the piston-rod,

valves, and igniting mechanism.

The invention also consists in the construction and combination of partsand details of the gasengine and igniting mechanism, as will be fullydescribed and set forth hereinafter, and finally pointed out in theclaims.

In the accompanying drawings, Figure 1 is a front view of my improvedgas-engine, parts being shown in cross-section. Fig. 2 is a centralcrosssectional elevation of the same. Fig. 3 is a horizontal sectionalview on the line w m, Fig. 2. Fig. 4 is a detail face view of the camand lever for operating the igniting mechanism. Fig. 5 is a longitudinalsectional view of the igniting mechanism on an enlarged scale.

Similar letters of reference indicate corresponding parts.

The pump-eylinder A, forming the base or body of the machine, contains apump-piston, A, secured to the lower end of the piston-rod B. On theupper end of the pump-cylinderA a casing, O, rests, in which theexplosion-chamber G is formed, said explosion chamber or cylindercontaining a cylindrical piston, D, of the construction usually used ingas-machines, said piston D being also secured to the pistonrod 13. Inthe lower part of the casing C an annular chamber, E, is formed, whichis in communication with the upper part of the pump-cylinder A, and fromthe center of the top of said chamber a cylindrical projection, F,extends downward, through the central bore of which projection thepiston rod B passes. A cylindrical valve, G, open at the top and closedat the bottom, fits snugly on said projection F, and is mounted to slideup and down on the same. A pin, G, passes through a longitudinal slot,G, of the said slide-valve G into the projection F to prevent the valvedropping too far. A series of channels, H, extend from the bottom of theexplosion-chamber 0 down through the projection F and have rectangularbends at their lower ends, so that the openings of said channels will bein the sides of the projection F, on which the cylindrical valve Gslides, said valve having apertures H, which can register with the lowerend of said channels H. A neck, I, projects upward from the bottom ofthe explosion-chamber G, the bore of which neck forms a continuation ofthe bore of the projection F, the piston-rod also passing through thebore of said neck I. A slide-valve, I, is mounted to slide on the neckI, and is provided on its lower end with an outwardly-projecting flange,Iflwhich can close the upper ends of the channels H in the bottom of theexplosion-chamber. A nut, 1 screwed on the upper end of the neck I,limits the upward movement of said valve 1.

The explosion-chamber is provided at its top with the exhaustaperturesJ, connecting the explosion-chamber with the annular exhaust-channel J,extending around the upper part of the explosion-chamber to J. An air orwater jacket, K, is formed around the explosion-chamber within thecasing G. A cross head, L, is secured to the upper end of the piston-rodB and passes through vertical slots L in the sides of the upper part ofthe casing 0. To the ends of the cross-head the connecting-rods M arepivotally connected, the lower ends of said connecting-rods beingconnected eccentrically with the disk M and the flywheel N on oppositeends of the shaft 0, which is journaled in that part of the casing 0between the bottom of the explosionchamber and the top of thepumpcylinder.

The chamber E, formed at the top of the pump-cylinder,is provided with alateral opening, 1?, with which the upper end of the mixing-chamber P isconnected, provided at its bottom with a port, Q, closed by anupwardlyswinging valve, Q, said valve also closing the upper end of achannel, It, in a neck, It,with

which the gas-supply pipe is to be connected, the channel being providedwith a cock, R to be closed when the machine is not to operate.

On the hub of the wheel M a cam, S, is formed to act on a lever, S,pivoted to the plate W on one side of the casing G, the swinging end ofsaid lever being forked to receive the end of a lever, T, the oppositeend of which is secured on a neck, U, of a conical valve, V, mounted toturn in a closely-fitting conical casing, W, the inner end of whichprojects into the lower part of the explosion-chamber, as shown in Fig.4 in, dotted lines. The valve V is provided with the four longitudinalslots V, which can register with corresponding slots, W, in that part ofthe casing projecting from the plate W in which the casing is secured. Apart, a, of the casing W projects into the explosion-chamber and isprovided with slots I), which can register with longitudinal slots 0 inthe inner part of the valve V. A block, d, is screwed into theinnerlarger end of the conical valve V, and on the inner or front end ofsaid valve a projection, f, is formed, having on its outer end theflange g, the diameter of which is slightly less than the internaldiameter of the widest part of the conical valve, as is shown in Fig. 3.The block (1 is provided with a longitudinal bore, 6, and the projectionf is provided with two smaller transverse bores, h, in communicationwith the bore 0. A needle-valve, m, projects into the front end of thebore 6, said needle-valve passing through the neck U of the valve, thatpart of the needle passing through the neck being screw-threaded, andthe valve is provided at its outer end with a hand-wheel, n, oranalogous device to facilitate turning it. By turning said needle-valveits pointed end is projected a greater or less distance into the bore 6of the block (1, and thus the channels it in the projection f can beopened or closed more or less by means of said needle-valve.

The operation is as follows: Referring to Fig. 2, when the explosiontakes place under he piston D, said piston isforced upward and the valve1 is forced down on its seat, thus closing the upper ends of thechannels H and preventing the products of explosion from passing downsaid channels. The piston A rises with the piston D and compresses themixture of gas and air in the chamber P and the cylinder A. By the timethat the bottom of the piston D has reached the apertures J of theoutlet-channels J, to permit the explosion or exhaust gases to escape,the top of the piston A strikes the bottom of the cylindrical valve E,which is raised, whereby the apertures H of the same are brought intoposition toregister with the lower ends of the channels H, thuspermitting the compressed mixture of gas and air to pass into andthrough the channels h to raise the cylindrical valve I and pass intothe lower part of the chamber or cylinder 0. The piston D then descendsand compresses said mixture of gas and air, and when the said piston hascompleted its downstroke the explosion takes place and the piston isthrown up again. At the same time that the piston Dis moved downward thepiston A l S likewise moved downward, whereby a vacuum or partial vacuumis created in the cylinder A and chamber P, so as to cause the openingof the valve Q to let air pass into the chamber. At the same time theend of the channel It is also opened and gas is admitted into thechamber P. During the greater part of the revolution of the shaft 0 thelever T is lowered and the slots W of the casing W do not register withthe slots V of the valve V. The cam S raises the lever Sa very shorttime before the explosion takes place, and the lever S raises the leverT, whereby the valve V is brought in such a position that the slots Wand V register and the flame of the burner p ignites the gas within thevalve V, the gas having passed into the valve through the bore 6. Thecam S then slides from under the lever S, the spring 0- pulls said leverdownward, and the valve V is turned so that the slots 0 and I) registerand the slots V are closed. Theignited gas in the burner ignites theexplosive mixture in the explosion chamber, the explosion takes place,and so on.

Having thus described my invention,Ielaim as new and desire to secure byLetters Patent- 1. In a gas engine, the combination of two cylindersmounted in line and separated by a solid portion provided withgas-channels establishing communication between the two cylinders, apiston-rod extending longitudinally through both cylinders, pistonsmounted on the piston-rod,valves in both cylinders for closing thechannels establishing communication between the two cylinders, and anigniting mechanism, substantially as shown and described.

2. In a gas-engine, the combination, with the cylinders A and G, of thedownwardlyprojecting part F on the top of the pump-cylinder A, thecylindrical valve G, mounted to slide on the said part E, and havingapertures that can register with the lower ends of channels H in theprojection F and the bottom of the cylinder 0, the valve I on a neck, I,projecting upward from the bottom of the explosion-cylinder C, thepiston-rod B, the piston D, mounted on the piston-rod B within the-cylinder 0, the piston A, mounted on the piston-rod B within thepump-cylinder A, and of the igniting mechanism, substantially as shownand described.

3. In a gas-engine, the combination, with a- IIO opening and closingsaid aperture more or less and extending to the outer end of the valve,substantially as shown and described.

4. In a gas-engine, the combination, with a casing a part of whichprojects into the explosion-chamber of the machine and part from theoutside of the machine, which casing has slots in the outer and innerpart, of a valve mounted to rock within said casing, and also providedwith inner and outer slots adapted to register with the slots of thecasing, a block secured in the inner end of the valve and having a borefor establishing communication be tween the interior of the valve andthe expl0- sionchamber, and a valve controlling said bore, substantiallyas shown and described.

5. In a gas-engine, the combination, with a casing having slots, of ahollow valve mounted on said casing, and also having slots that canregister with the slots of the casing, a block in the inner end of thecasing, said block being provided on its inner end with a neck having anannular flange the rim of which is a short distance from the innersurface of the valve, a transverse bore in said neck, and a boreextending from the outer end of the block to the transverse bore in theneck, substantially as herein shown and described.

6. The combination of an explosion-cylinder, a piston in the same, apiston-rod, the shaft 0, the cam S, the pivoted lever S, the lever T,engaged with the lever S, the slotted casing IV, the hollow valve Vwithin the easing, the burner 19, and the lever T, engaged with thelever S and connected with the upper end of the valve V, substantiallyas herein shown and described.

In testimony thatI claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

- HENRY HARTIG.

Witnesses:

PAUL GoErEL, JOHN A. STRALEY.

